Combining like terms

[math"]

a) 2x+3x+3+4x^{2_{+10+x
b) 4x+4y}2}+y^{2_{+9+10+x+3x
c)2x}2}+30+3x²+4x²+14+x
d) 20+5xy+4x²+14+x

 

[mmm4444bot]

Have you learned yet the meaning of the phrase "like-terms" ?

If not, you should be asking about that.

If so, then why are you stuck?